Achyranthes japonica

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Achyranthes japonica
Achyranthes japonica.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Amaranthaceae
Genus: Achyranthes
Species:
A. japonica
Binomial name
Achyranthes japonica

Achyranthes japonica, commonly known as Oriental chaff flower [1] or Japanese chaff flower, is a perennial member of the genus Achyranthes in the family Amaranthaceae. It can be discovered on the roadside and its main distribution is in Korea and Japan. [2]

Contents

Ecology

A. japonica is a perennial plant growing to 50–100 cm (20–39 in) in height with thickened roots. Stems are quadrangular, branched, and glabrous or slightly pubescent. [2] Stem nodes are dilated. The petiolate leaves are opposite, elliptic or oblong, and slightly pubescent, 10–20 cm (3.9–7.9 in) long and 4–10 cm (1.6–3.9 in) wide. Tiny green flowers bloom from August to September, with inflorescence spikes in axils and at terminals of the stem. Each flower has five fused stamens and a single pistil. Tiny branch-shaped bracts easily stick to clothing. [2] [3]

Members of the genus Achyranthes in cultivation call for partial shade and rich, deep, well-drained soil, sandy and slightly acid. [4] A. japonica grows in woody areas in lowlands and hills. [2]

Chemical compounds and traditional medicine

The root of the plant is used in the traditional medicine of Korea. Several chemical constituents have been isolated. The seeds contain various hormones, including ecdysterone, rubrosterone, and inokosterone. The roots contain triterpenoids and saponins. The plant provides the antioxidant protocatechuic acid. [2]

Status in United States

Achyranthes japonica is an introduced species in the United States. It was first reported in Kentucky in the 1980s, and by 2014 it was established in nine states of the Ohio River basin. [3] As of 2025, the plant has been reported as far west as Missouri, as far south as Georgia, and as far east as Virginia. [5]

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References

  1. English Names for Korean Native Plants (PDF). Pocheon: Korea National Arboretum. 2015. p. 336. ISBN   978-89-97450-98-5. Archived from the original (PDF) on 25 May 2017. Retrieved 25 January 2016 via Korea Forest Service.
  2. 1 2 3 4 5 World Health Organization 1998, p. 3.
  3. 1 2 Animal and Plant Health Inspection Service. "Weed Risk Assessment for Achyranthes japonica (Miq.) Nakai – Japanese chaff flower". U.S. Department of Agriculture. Retrieved 31 January 2025.
  4. Bown 2001, p. 99.
  5. Weakley, A.S.; Southeastern Flora Team (2025). "Flora of the southeastern United States Web App". Chapel Hill, N.C.: University of North Carolina Herbarium, North Carolina Botanical Garden. Retrieved 31 January 2025.

Bibliography